Installation Guide

Page 3
STOP! Read this section before you start! (continued)
Roof Top Decks
DO NOT attach deck boards to a floating sub-structure which
is not mechanically fastened frequently and sufficiently to the
building and roof deck.
Note
AZEK Deck is NOT intended for use as columns, support
posts, beams, joist stringers, guard railing or other primary
load-bearing members. AZEK must be supported by a code-
compliant substructure. While AZEK products are great for
deck re-planking (removing old deck surface boards and
installing AZEK on code-compliant substructure), AZEK
Deck Boards CANNOT be installed on top of an existing
deck.
When considering AZEK
®
Deck in a roof top application, it
is imperative that the framing/sub-structure to which the
decking will be attached is securely attached to the building
or roof deck using suitable mechanical fasteners. Do not use
adhesives to attach framing to the building or roof surface, and
NEVER ATTACH DECK BOARDS TO A FLOATING FRAME/SUB-
STRUCTURE. Frequently check tops of sub-structure framing
members to ensure that they are in plane, as AZEK® Decking
will conform to the contour of the framing members to which
it is attached. It may be necessary to shim or plane framing
members due to thickness variations in lumber, or variations
in the surface to which the framing/sub-structure is attached.
Securely attaching rigid blocking between framing members
Failure to install TimberTech AZEK Decking products
in accordance with applicable building codes and
this Installation Guide may lead to personal injury,
affect deck system performance and void the product
warranty.
at frequent intervals should also be incorporated to help limit
sub-structure movement. Proper drainage and air flow should
also be considered, with a minimum of 1 ½” sleeper height
necessary and deck boards must be attached to the properly
secured sub-structure with a minimum of a 1/8” gap between
deck boards. It is the installer’s responsibility to determine if
AZEK® Deck is suitable for a specific roof top application. The
AZEK Company recommends that all applications be reviewed
by a licensed architect, engineer, or local building official
before installation. If you have any questions or need further
assistance, please call AZEK Customer Service at 1-877-275-
2935 or visit our website at www.azek.com.
Always make sure to visit TimberTech.com to ensure you are viewing the most current
installation instructions, care and cleaning, technical information and more.
Be aware of excessive heat on the surface of AZEK products
from external sources, such as but not limited to, fire or
reflection of sunlight from energy-efficient window products.
Low-emissivity (Low-E) glass can potentially harm AZEK
products. Low-E glass is designed to prevent passive heat
gain within a structure and can cause unusual heat build-
up on exterior surfaces. This extreme elevation of surface
temperatures, which exceeds that of normal exposure, can
possibly cause AZEK products to melt, sag, warp, discolor,
increase expansion/contraction, and accelerate weathering.
Current or potential AZEK customers that have concerns
about possible damage by Low-E glass should contact the
manufacturer of the product which contains Low-E glass for a
solution to reduce or eliminate the effects of reflected sunlight.
Metamerism is the phenomenon wherein two colored
samples will appear to be of the same shade under one
light source but will appear to be different shades under
a second source. When installing AZEK deck boards
at different angles, metamerism may make the boards
installed at one angle appear to be of a different shade than
the deck boards installed at the other angle, depending on
the lighting and the angle which the deck is viewed. This
is a natural phenomenon, not a defect, and can occur even
when the deck boards are cut from the same boards or
come from the same unit. Metamerism is an aesthetic
issue and not a performance or product warranty issue.
Extreme Heat Warning Metamerism
Installing TimberTech AZEK
®
Decking